package com.wangxiaoxuan.seckill.controller;

import com.wangxiaoxuan.seckill.pojo.User;
import com.wangxiaoxuan.seckill.service.IGoodsService;
import com.wangxiaoxuan.seckill.service.IUserService;
import com.wangxiaoxuan.seckill.vo.GoodsVo;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.ValueOperations;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.util.StringUtils;
import org.springframework.web.bind.annotation.CookieValue;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.thymeleaf.context.WebContext;
import org.thymeleaf.spring5.view.ThymeleafViewResolver;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.util.Date;
import java.util.concurrent.TimeUnit;

/**
 * @author 王小轩
 * @version 1.0
 * 商品
 */
@Controller
@RequestMapping("/goods")
public class GoodsController {

    @Autowired
    private IUserService userService;
    @Autowired
    private IGoodsService goodsService;
    @Autowired
    private RedisTemplate redisTemplate;
    @Autowired
    private ThymeleafViewResolver thymeleafViewResolver;
    /**
     * 跳转商品页面
     * @return
     */
    @RequestMapping(value = "/toList",produces = "text/html;charset=utf-8")
    @ResponseBody
    public String toList(Model model,User user,HttpServletRequest request,HttpServletResponse response){
        //从redis中获取页面，不为空，直接返回
        ValueOperations valueOperations = redisTemplate.opsForValue();
        String html = (String) valueOperations.get("goodsList");
        if (!StringUtils.isEmpty(html)){
            return html;
        }
        //都没问题
        model.addAttribute("user",user);
        model.addAttribute("goodsList",goodsService.findGoodsVo());

        //如果为空,手动渲染并存入redis返回
        WebContext webContext = new WebContext(request,response,request.getServletContext(),request.getLocale(),model.asMap());
         html = thymeleafViewResolver.getTemplateEngine().process("goodsList", webContext);
         if (!StringUtils.isEmpty(html)){
             valueOperations.set("goodsList",html,60, TimeUnit.SECONDS);
         }
        return html;
    }

    @RequestMapping(value = "/toDetail/{goodsId}",produces = "text/html;charset=utf-8")
    @ResponseBody
    public String toDetail(Model model,User user,@PathVariable Long goodsId,HttpServletRequest request,HttpServletResponse response){
        ValueOperations valueOperations = redisTemplate.opsForValue();
        String html = (String) valueOperations.get("goodsDetail"+goodsId);
        if (!StringUtils.isEmpty(html)){
            return html;
        }
        model.addAttribute("user",user);
        GoodsVo goodsVo = goodsService.findGoodsVoByGoodsId(goodsId);
        Date startDate = goodsVo.getStartDate();
        Date endDate = goodsVo.getEndDate();
        Date nowDate = new Date();
        //秒杀状态
        int secKillStatus = 0;
        //秒杀倒计时
        int remainSeconds = 0;
        if (nowDate.before(startDate)){
            secKillStatus=0;
             remainSeconds = (int)((startDate.getTime() - nowDate.getTime()) / 1000);
        }else if (nowDate.after(endDate)){
            secKillStatus=2;
            remainSeconds=-1;
        }else {
            secKillStatus=1;
            remainSeconds=0;
        }
        model.addAttribute("remainSeconds",remainSeconds);
        model.addAttribute("secKillStatus",secKillStatus);
        model.addAttribute("goods",goodsVo);
        WebContext webContext = new WebContext(request,response,request.getServletContext(),request.getLocale(),model.asMap());
         html = thymeleafViewResolver.getTemplateEngine().process("goodsDetail", webContext);
         if (!StringUtils.isEmpty(html)){
             valueOperations.set("goodsDetail"+goodsId,html,60,TimeUnit.SECONDS);
         }
        return html;
    }
}
